73055921 has 2 divisors, whose sum is σ = 73055922. Its totient is φ = 73055920.

The previous prime is 73055903. The next prime is 73055923. The reversal of 73055921 is 12955037.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57760000 + 15295921 = 7600^2 + 3911^2 .

It is a cyclic number.

It is not a de Polignac number, because 73055921 - 2¹⁰ = 73054897 is a prime.

Together with 73055923, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (73055923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36527960 + 36527961.

It is an arithmetic number, because the mean of its divisors is an integer number (36527961).

Almost surely, 2^73055921 is an apocalyptic number.

It is an amenable number.

73055921 is a deficient number, since it is larger than the sum of its proper divisors (1).

73055921 is an equidigital number, since it uses as much as digits as its factorization.

73055921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9450, while the sum is 32.

The square root of 73055921 is about 8547.2756478307. The cubic root of 73055921 is about 418.0406105855.

The spelling of 73055921 in words is "seventy-three million, fifty-five thousand, nine hundred twenty-one".